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With all the new emissions requirements, Cummins has transitioned to a closed crankcase ventilation (CCV) system. This can result in a buildup of oil residue inside your intake system and reduce the performance and potentially accelerate the wear and tear on engine components. Our Open CCV Kit for the 2007-2018 Dodge Cummins 6.7L trucks will keep your intake tube, turbo and intercooler free of oily crankcase buildup.